Some research efforts have been devoted to FL and blockchain in edge computing. The works in [1]}, [2]}, [3]} discussed the key concepts of FL and its protocol, architectures, and applications in wireless networks. The survey in [4]} presented the use of FL in mobile edge networks, focusing on challenges of FL implementation in edge computing and possible applications of FL in edge network optimization. Another study in [5]} provided an overview of FL in fog computing
along with a discussion of fundamental FL theories in learning and model compression. Moreover, solutions and methods for data preservation in FL implementation were explored in [6]}. Meanwhile, the potential of blockchain in edge computing was investigated in [7]} through a holistic survey on related issues such as scalability, resource management and network security. The use of blockchain in edge computing was also analyzed in [8]} from the perspective of consensus and scalability.
